Origin Validation Error Affecting python-aiohttp package, versions <3.14.0-1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.15% (5th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-PYTHONAIOHTTP-17138880
  • published3 Jun 2026
  • disclosed2 Jun 2026

Introduced: 2 Jun 2026

CVE-2026-47265  (opens in a new tab)
CWE-346  (opens in a new tab)

How to fix?

Upgrade Debian:unstable python-aiohttp to version 3.14.0-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-aiohttp package and not the python-aiohttp package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.14.0, cookies set with the cookies parameter on requests are sent after following a cross-origin redirect. If a developer uses the cookies parameter on a per-request basis then sensitive data might be leaked to an attacker if they manage to control a redirect. Version 3.14.0 patches the issue. If unable to upgrade, using a Cookie header in the headers parameter is not vulnerable.

CVSS Base Scores

version 3.1